165697 has 4 divisors (see below), whose sum is σ = 189376. Its totient is φ = 142020.

The previous prime is 165673. The next prime is 165701. The reversal of 165697 is 796561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165697 - 2⁷ = 165569 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (165617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11829 + ... + 11842.

It is an arithmetic number, because the mean of its divisors is an integer number (47344).

2¹⁶⁵⁶⁹⁷ is an apocalyptic number.

It is an amenable number.

165697 is a deficient number, since it is larger than the sum of its proper divisors (23679).

165697 is an equidigital number, since it uses as much as digits as its factorization.

165697 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23678.

The product of its digits is 11340, while the sum is 34.

The square root of 165697 is about 407.0589637878. The cubic root of 165697 is about 54.9251875404.

The spelling of 165697 in words is "one hundred sixty-five thousand, six hundred ninety-seven".